Julius, the best I have used of the bunch in my Rock Island's is the Chip McCormick Rang Pro's : -- cmproducts.com/Range-Pro-Full-Size-1911-9mm-10-Round-Stainless_p_361.html

Julius, I've had good luck with several brands. My first choice would be mecgar, but metalform and chip McCormick magazines have also worked very well in mine. Buds doesn't have any 10 round mecgar mags in stock but here's a link to a 9 round magazine that works great in mine if interested. Hope this helps, link here............budsgunshop.com/product_info.php/products_id/57076/magazine+for+1911+9mm+9+round+blue